In teeth, more cracks are better than one

Small, extending tufts may give tooth enamel its strength

5:27pm, April 13, 2009

Mammalian tooth enamel is as brittle as glass, yet the teeth can withstand the force required to hold a 220-pound barbell steady. Now a team of materials scientists and anthropologists reports how the structure of tooth enamel gives teeth the strength to bear a lifetime of chewing.

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